Advanced traffic light control system using barrier gate and GSM

The aim of the project is to design a density based traffic light control system interfaced with a barrier gate and a GSM technology. The signal timing changes automatically with the density of the traffic and delay is provided with the help of microcontroller. When the signal is red the interfaced barrier gate closes and a buzzer notifies the closing of gate, thereby blocking the traffic but when the signal is green the same barrier opens and allows a proper flow of vehicles to avoid traffic jam. The density of traffic is detected using IR sensor and the output is given to the microcontroller for timing change of the signal, and buzzer action. In front of the barrier gate a stop line is drawn and with the help of another IR sensor, the vehicle is tracked whenever it crosses the stop line. If the vehicle crosses the stop line, the intimation is given to the nearby control room, carried out by GSM technology. PIC microcontroller is used for signal timing change based on density of traffic.